Proper Way to Configure a Domain which never sends emails

[Barry Margolin]

In article <mailman.937.1566250284.711.bind-users at lists.isc.org>,
 Kevin Darcy <kevin.darcy at fcagroup.com> wrote:

> [ Classification Level: PUBLIC ]

Huh? Why does something sent to a public mailing list need an explicit 
"classification level"?

> 
> MXes are for *receiving* mail of course. The request is about *sending*
> mail.

True, but there's a common assumption that mail is sent from a domain 
that can receive mail. Even email that says "Don't reply to this" 
usually comes from an account at a domain that can receive mail; they 
just ignore that mailbox.

> >
> > A common practice is to point the MX record to ".".
> >
> > --
> > Barry Margolin
> > Arlington, MA

-- 
Barry Margolin
Arlington, MA